Fabrication of Al2O3–ZrO2 ceramics with high porosity and strength

K. S. Kamyshnaya, T. A. Khabas

Research output: Contribution to journalArticlepeer-review

Abstract

This study describes the synthesis of ceramics, in which a micrometre-sized Al2O3–ZrO2 nanopowder was used as an oxide base for the hardening of the materials. To a suspension of this mixed metal oxide, the pore-forming crystallisation additives camphor and carbamide were added to produce ceramics with thin permeable pores. Camphor crystallised in the oxide suspension in the form of single pentagonal stars and сarbamide crystallised in the form of thin elongated needles. The use of the different crystallisation additives allowed the formation of ceramics after sintering that have both permeable and complex pore morphologies, where anisotropic properties were observed using carbamide as an additive but not when camphor was used. The total porosity of the resulting ceramics was 51.3%, with a compressive strength in the range of 17.3–92.3 MPa.

Original languageEnglish
Pages (from-to)1666-1671
Number of pages6
JournalCeramics International
Volume47
Issue number2
DOIs
Publication statusPublished - 15 Jan 2021

Keywords

  • AlO–ZrO
  • Porosity
  • Strength

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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